CN108278139B

CN108278139B - Air supplement type engine tail gas treatment system and method thereof

Info

Publication number: CN108278139B
Application number: CN201810053200.1A
Authority: CN
Inventors: 唐天庆
Original assignee: Nanjing Lishui Hi Tech Venture Capital Management Co Ltd
Current assignee: Chongqing Hiter Automotive Exhaust Systems Co ltd
Priority date: 2018-01-19
Filing date: 2018-01-19
Publication date: 2020-06-19
Anticipated expiration: 2038-01-19
Also published as: CN108278139A

Abstract

The invention discloses a gas supplementing type engine tail gas treatment system, which comprises an engine exhaust pipe, a silencer body and a silencer exhaust pipe, wherein the silencer exhaust pipe is arranged on the engine exhaust pipe; the air inlet end of the engine tail gas exhaust pipe is communicated and connected with the exhaust valve end of the four-stroke engine; the exhaust end of the engine exhaust pipe is in conduction connection with the exhaust inlet end of the muffler body; the tail gas exhaust end of the silencer body is connected with the silencer exhaust pipe in a conduction mode; the deflagration buffer cylinder structure is adopted, so that deflagration noise generated in the muffler after the air supplement device is added is effectively weakened; the tail gas combustion-supporting air supplementing valve is used for supplementing oxygen contained in the air into the engine so as to generate combustion reaction with residual harmful gases such as CO and HC which are not completely combusted in the engine, so that products such as completely combusted carbon dioxide are finally discharged, and the emission of harmful gases is reduced; the structure of the movable plug is adopted, so that the resistance silencing volume of the second movable expansion cavity and the first movable expansion cavity is larger than the actual volume of the second movable expansion cavity and the first movable expansion cavity.

Description

Air supplement type engine tail gas treatment system and method thereof

Technical Field

The invention belongs to the field of silencers, and particularly relates to a gas supplementing type engine tail gas treatment system and a method thereof.

Background

After fuel oil of an engine is combusted in a cylinder, a large amount of combustible gases such as CO, HC and the like which are not completely combusted exist in tail gas, and the fuel oil can be continuously combusted in a silencer to generate a deflagration effect, so that intermittent sound is great; meanwhile, the fixed expansion cavity is adopted in the internal expansion cavity of the existing silencer, and if the reactive silencing strength needs to be improved, the volume of the silencer needs to be increased.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides an air supplementing type engine tail gas treatment system and an air supplementing type engine tail gas treatment method for effectively weakening detonation noise.

The technical scheme is as follows: in order to achieve the purpose, the invention provides a gas supplementing type engine tail gas treatment system, which comprises an engine exhaust pipe, a silencer body and a silencer exhaust pipe; the air inlet end of the engine tail gas exhaust pipe is communicated and connected with the exhaust valve end of the four-stroke engine; the exhaust end of the engine exhaust pipe is in conduction connection with the exhaust inlet end of the muffler body; the tail gas exhaust end of the silencer body is connected with the silencer exhaust pipe in a conduction mode;

the silencer body comprises a silencer outer cylinder which is of a closed cylinder structure; a silencer separating disc is coaxially arranged in the middle of the inner cavity of the silencer outer barrel; the left side of the separating disc is a left silencer section, and the right side of the separating disc is a right silencer section;

an explosion buffer cylinder is coaxially arranged in the inner cavity of the right section of the silencer, and an explosion overflow channel is formed between the explosion buffer cylinder and the inner wall of the outer cylinder of the silencer; the right end of the deflagration buffer cylinder is in conduction connection with the tail gas discharge end of the engine tail gas exhaust pipe, the left end of the deflagration buffer cylinder coaxially extends into the right end inner cavity of the left section of the muffler, the end part of the left end of the deflagration buffer cylinder is coaxially and integrally provided with a first baffle disc, a plurality of exhaust meshes are distributed on a section of pipe wall of the deflagration buffer cylinder extending into the left section of the muffler, the exhaust meshes are uniformly distributed in a circumferential array, and the deflagration buffer cylinder and the right end inner cavity of the left section of the muffler are mutually conducted through the exhaust meshes;

a sharp-pointed conical column is suspended coaxially in a deflagration cavity of the deflagration buffer cylinder, and the thick end of the sharp-pointed conical column is fixedly connected with the first baffle disc through a supporting rod with the same axis; a plurality of deflagration buffering air release holes are circumferentially distributed on the wall of the deflagration buffering cylinder, which is close to one side of the tip end of the pointed conical column; each deflagration buffering air leakage hole conducts the deflagration cavity and the deflagration overflow channel with each other;

the deflagration spills over and is equipped with a plurality of eduction holes in the fretwork of circumference array on the silencer divider disc of passageway left end, the eduction hole will the deflagration spills over the passageway with the right-hand member inner chamber of silencer left section switches on each other.

Further, the first baffle disc is of a disc-shaped structure, and a first annular gap is formed between the first baffle disc and the outer cylinder of the silencer; a first fixed expansion cavity is formed between the first baffle disc and the muffler separating disc; the left end of the inner cavity of the left section of the silencer is in coaxial conduction connection with the silencer exhaust pipe; a second baffle disc is coaxially arranged at one end, close to a tail gas outlet of the silencer, in the inner cavity of the left section of the silencer, a second annular gap is formed between the second baffle disc and the inner wall of the outer cylinder of the silencer, and a second fixed expansion cavity is formed between the second baffle disc and the left end wall of the outer cylinder of the silencer;

a connecting column is coaxially arranged between the first baffle disc and the second baffle disc; the two ends of the connecting column are respectively and integrally fixedly connected with a first baffle disc and a second baffle disc;

the device also comprises a movable plug; the movable plug is of a hollow cylinder structure; the movable plug is coaxial with the inner cavity of the left section of the silencer; the cylindrical outer wall of the movable plug is in clearance fit with the inner wall of the outer cylinder of the silencer; the middle part of the right end wall of the movable plug is coaxially and hollowly provided with a first through hole with the diameter larger than that of the connecting column, and the middle part of the left end wall of the movable plug is coaxially and hollowly provided with a second through hole with the diameter larger than that of the connecting column; the connecting column is respectively inserted into the first through hole and the second through hole; the middle part of the connecting column is integrally provided with a spring catch disc coaxially; a first return spring and a second return spring are further sleeved on the connecting column, the first return spring is located between the right end wall and the spring retaining disc, and the second return spring is located between the left end wall and the spring retaining disc; a first movable expansion cavity is formed between the first baffle disc and the right end wall, and a second movable expansion cavity is formed between the left end wall and the second baffle disc;

the gas guide pipe is characterized by further comprising a plurality of gas guide pipes, each gas guide pipe penetrates through the plug cavity of the movable plug along the axis direction, two ends of each gas guide pipe respectively extend into the first movable expansion cavity and the second movable expansion cavity, and the gas guide pipes are uniformly distributed along the axis of the movable plug in a circumferential array mode.

The tail gas combustion-supporting air supplement valve comprises an air supplement pipe, and the air supplement pipe is of a hard pipe body structure; the air supply pipe is vertically and integrally connected with the engine tail gas exhaust pipe, and the air outlet end of the air supply pipe bypasses an airflow channel of the engine tail gas exhaust pipe;

the inner tube of the air supply pipe also comprises a valve ring platform, the outer ring of the valve ring platform is hermetically connected with the inner wall of the air supply pipe, the inner ring of the valve ring platform is of a taper hole structure, and one end of a taper hole of the inner ring, which is close to the exhaust pipe of the silencer, is a taper hole thick end;

a valve core is coaxially arranged in the air supply pipe; the valve core is of a conical thin-wall revolving body structure, and the conical outer wall of the valve core is in sealing contact with the inner ring taper hole of the valve annular table;

a spring seat is coaxially supported and arranged on one side, far away from the thick end of the valve core, in the air supply pipe, and the spring seat is of a rotary body structure with the diameter smaller than the inner diameter of the air supply pipe; the spring seat is in supporting connection with the inner diameter of the air supplementing pipe through at least one supporting part; a cylindrical spring boss is arranged on one side of the spring seat close to the valve core;

the tube of the air supply tube also coaxially comprises a valve core guide post and a valve core stroke control post; the valve core guide column and the valve core stroke control column are respectively and fixedly connected to two ends of a valve tip of the valve core, wherein the valve core stroke control column is positioned on one side close to the spring seat;

the device also comprises a top pressure spring in a compressed state; one end of the top pressure spring is sleeved on the valve core stroke control column, and the other end of the top pressure spring is sleeved on the spring boss; a stroke limiting space is arranged between the tail end of the valve core stroke control column and the tail end of the spring boss;

a limiting column base is coaxially supported in the air supply pipe and is of a revolving body structure with the diameter smaller than the inner diameter of the air supply pipe; the limiting column base support is connected with the inner wall support of the air supply pipe through a supporting rod; the valve core guide post can movably penetrate through a guide post hole in the limiting post seat;

in the air supply pipe, one side of the valve ring platform, which is close to the engine tail gas exhaust pipe, is a negative pressure forming cavity, and one side of the valve ring platform, which is far away from the engine tail gas exhaust pipe, is an air channel cavity; a driven fan blade is coaxially arranged in the air duct cavity; the other end of the fan rotating shaft of the driven fan blade is synchronously connected with a machine core rotor of the generator.

Further, a method of an exhaust gas treatment system of an air-supplementing type engine comprises the following steps:

tail gas silencing process: when the four-stroke engine runs, the exhaust stroke in four strokes in one state period of the engine rapidly enters an engine tail gas exhaust pipe through high-temperature and high-pressure exhaust gas in a cylinder along with pulse waves and is rapidly guided into a deflagration cavity, in the process, air supplemented by a tail gas combustion-supporting air supplement valve also enters the engine tail gas exhaust pipe, residual gases such as CO and HC which are not completely combusted in the cylinder and the supplemented air are deflagrated in the deflagration cavity, the pulse waves and the tail gas generated by deflagration are outwards expanded under the drainage action of a pointed cone column, and then part of expanded smoke and pulses are dispersed in a divergent manner to a deflagration overflow channel through each deflagration buffering gas vent group, and the process has resistive silencing and resistive silencing effects;

residual tail gas and pulse waves in the deflagration cavity are guided into the first fixed expansion cavity through each exhaust mesh, meanwhile, the tail gas and the pulse waves in the deflagration overflow channel are guided into the first fixed expansion cavity through each guide-out hole, and in the first fixed expansion cavity, because the pulse waves from different paths are converged, and the pulse waves with partially opposite phases cause cancellation interference; the CO, HC and other gases which are not completely reacted in the first fixed expansion cavity fully react with the supplemented oxygen and expand, the further rapidly expanded gases and pulse waves in the first fixed expansion cavity enter the first movable expansion cavity through a first annular gap between the first baffle disc and the outer cylinder of the silencer, the pressure of the first movable expansion cavity is rapidly increased in the process that the pulse waves and the expanded tail gas enter the first movable expansion cavity, the movable plug is further pushed to rapidly move leftwards, the volume of the first movable expansion cavity is enlarged along with the leftward movement of the movable plug, and the reactive silencing strength of the first movable expansion cavity is further improved; furthermore, tail gas and pulse waves at the central part of the first movable expansion cavity enter the plug cavity through a gap ring between the connecting column and the first through hole to generate resistance noise elimination, the tail gas and the pulse waves at the edge part of the first movable expansion cavity enter the plurality of air guide pipes to generate resistance noise elimination in the air guide pipes, and simultaneously vibration generated by the outer wall of each air guide pipe generates resonance with the vibration of the plug cavity to generate partial interference cancellation effect; furthermore, tail gas in each gas guide tube and the plug cavity is guided into the second movable expansion cavity together with pulse waves, at the moment, pulse waves from different paths are converged in the second movable expansion cavity, part of pulse waves with opposite phases cause offset interference, so that a pulse interference noise elimination effect is generated in the second movable expansion cavity, meanwhile, the pressure in the second movable expansion cavity rapidly begins to increase, the tail gas in the next engine exhaust stroke does not reach the first movable expansion cavity, the pressure in the first movable expansion cavity rapidly decreases, the second movable expansion cavity pushes the movable plug to rapidly move rightwards, the volume of the second movable expansion cavity is enlarged along with the rightward movement of the movable plug, and further, the resistance noise elimination strength of the second movable expansion cavity is improved; the reciprocating circulation is carried out in such a way that the resistant silencing volumes of the second movable expansion cavity and the first movable expansion cavity are larger than the actual volumes of the second movable expansion cavity and the first movable expansion cavity; further, tail gas in the second movable expansion cavity enters the second fixed expansion cavity through the second annular gap along with the pulse wave, and finally the tail gas is exhausted through the exhaust pipe of the muffler;

and (3) combustion-supporting oxygen gas supplementing process: when the four-stroke engine is operated, the exhaust pressure in an exhaust pipe of the engine is periodically changed along with four working cycles of the engine, and in one cycle period of the engine: when an exhaust valve of the four-stroke engine is opened, high-temperature and high-pressure waste gas in a cylinder rapidly enters an exhaust pipe of the engine, the pressure in the exhaust pipe of the engine begins to rise, a high-pressure pulse is generated in the exhaust pipe of the engine, namely, a positive pressure wave is generated, then a negative pressure forming cavity in an air supply pipe forms strong positive pressure, the negative pressure forming cavity generates outward extrusion force on a valve core, and because one end of a conical hole of an inner ring of a valve ring platform, which is close to the exhaust pipe of a silencer, is a thick end of the conical hole, a conical outer wall of the valve core tightly extrudes the inner ring of the valve ring platform, so that a space between an air channel cavity and the negative; the positive pressure pulse wave continuously propagates forwards along the exhaust pipe of the engine, after the positive pressure wave enters the silencer body, the section of the pipeline is suddenly increased, the gas density is reduced, so that a negative pressure wave is generated to return, further a strong negative pressure is formed at the negative pressure forming cavity, at the moment, the negative pressure forming cavity generates inward suction to the valve core, the conical outer wall of the valve core begins to separate from the inner ring taper hole of the valve annular table under the action of negative pressure in the negative pressure forming cavity, so that a gas passing gap is formed between the conical outer wall of the valve core and the inner ring of the valve annular table rapidly, the opening and closing of the through gap is controlled by the travel limit distance arranged between the tail end of the valve core travel control column and the tail end of the spring boss, the stroke limiting interval avoids the consequence that the opening and closing sensitivity of the valve core is reduced due to overlarge return stroke caused by overlarge gas passing clearance formed between the conical outer wall of the valve core and the valve annular table; at the moment, because the air duct cavity is at the atmospheric pressure of the environment, the air in the air duct cavity is rapidly sucked into the negative pressure forming cavity under the action of negative pressure and further enters the exhaust pipe of the engine and the muffler body, and oxygen contained in the air supplemented by the tail gas combustion-supporting air supplementing valve is fully reacted with residual harmful gases such as CO and HC which are not completely combusted in the engine to generate combustion reaction, so that products such as completely combusted carbon dioxide are finally discharged, and the emission of the harmful gases is reduced; when the next exhaust period comes, the negative pressure in the negative pressure forming cavity is rapidly lost, the conical outer wall of the valve core tightly presses the inner ring of the valve annular table under the action of the jacking spring, and the air channel cavity and the negative pressure forming cavity are restored to be closed; due to the period and the short duration of the engine, the comprehensive effect is that air in the air duct cavity is continuously sucked into the negative pressure forming cavity, then the formed air flow drives the fan blade to continuously rotate, the fan blade drives the machine core rotor of the generator at the other end of the fan rotating shaft to rotate, and power is generated to supply power for other electric devices.

Has the advantages that: the invention has simple structure, adopts the deflagration buffer cylinder structure, and effectively weakens deflagration noise generated in the muffler after the air supplement device is added; the tail gas combustion-supporting air supplementing valve is used for supplementing oxygen contained in the air into the engine so as to generate combustion reaction with residual harmful gases such as CO and HC which are not completely combusted in the engine, so that products such as completely combusted carbon dioxide are finally discharged, and the emission of harmful gases is reduced; the structure of the movable plug is adopted, so that the resistance silencing volume of the second movable expansion cavity and the first movable expansion cavity is larger than the actual volume of the second movable expansion cavity and the first movable expansion cavity.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is an overall first cross-sectional view of the present invention;

FIG. 3 is an overall second cross-sectional view of the present invention;

FIG. 4 is an overall third cross-sectional view of the present invention;

FIG. 5 is a three-dimensional sectional view of the tail gas combustion-supporting gulp valve;

fig. 6 is a partial cross-sectional view of the valve cartridge.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

1. The structure introduction of the scheme is as follows: an after-filling engine exhaust gas treatment system as shown in fig. 1 to 4, comprising an engine exhaust pipe 7, a muffler body 44 and a muffler exhaust pipe 43; the air inlet end of the engine tail gas exhaust pipe 7 is connected with the exhaust valve end of the four-stroke engine in a conduction mode; the air outlet end of the engine tail gas exhaust pipe 7 is in conduction connection with the tail gas inlet end of the muffler body 44; the exhaust end of the muffler body 44 is connected with the muffler exhaust pipe 43 in a conduction manner;

the muffler body 44 comprises a muffler outer cylinder 12, and the muffler outer cylinder 12 is of a closed cylinder structure; a silencer separating disc 8.1 is coaxially arranged in the middle of the inner cavity of the silencer outer cylinder 12; the left side of the separating disc 8.1 is a silencer left section 101, and the right side of the separating disc 8.1 is a silencer right section 102;

a deflagration buffer cylinder 71 is coaxially arranged in the inner cavity of the right silencer section 102, and a deflagration overflow channel 74 is formed between the deflagration buffer cylinder 71 and the inner wall of the silencer outer cylinder 12; the right end of the deflagration buffer cylinder 71 is in conduction connection with the tail gas exhaust end of the engine tail gas exhaust pipe 7, the left end of the deflagration buffer cylinder 71 coaxially extends into the right end inner cavity of the left section 101 of the muffler, the end part of the left end of the deflagration buffer cylinder 71 coaxially and integrally provided with a first baffle disc 9, a plurality of exhaust meshes 1 are distributed on a section of pipe wall of the deflagration buffer cylinder 71 extending into the left section 101 of the muffler, each exhaust mesh 1 is uniformly distributed in a circumferential array, and each exhaust mesh 1 conducts the deflagration buffer cylinder 71 and the right end inner cavity of the left section 101 of the muffler mutually;

a sharp-pointed conical column 57 is coaxially suspended in the deflagration cavity 67 of the deflagration buffer cylinder 71, and the thick end of the sharp-pointed conical column 57 is fixedly connected with the first baffle disc 9 through a supporting rod 07 which is coaxial; a plurality of deflagration buffering air release holes 72 are circumferentially distributed on the cylinder wall of the deflagration buffering cylinder 71 close to one side of the tip end of the tapered column 57 in an array manner; each deflagration buffering air leakage hole 72 is used for communicating the deflagration cavity 67 with a deflagration overflow channel 74;

the deflagration overflows and is had a plurality of eduction holes 8.3 in the fretwork of circumference array on the silencer divider disk 8.1 of passageway 74 left end, eduction hole 8.3 will deflagration overflow passageway 74 with the right-hand member inner chamber of silencer left segment 101 switches on each other.

The first baffle disc 9 is of a disc-shaped structure, and a first annular gap 9.1 is formed between the first baffle disc 9 and the silencer outer cylinder 12; a first fixed expansion cavity 8 is arranged between the first baffle disc 9 and the muffler separating disc 8.1; the left end of the inner cavity of the left section 101 of the silencer is coaxially connected with the silencer exhaust pipe 43 in a conducting manner; a second baffle 38 is coaxially arranged at one end, close to the exhaust outlet 37 of the silencer, in the inner cavity of the left section 101 of the silencer, a second annular gap 38.1 is formed between the second baffle 38 and the inner wall of the silencer outer cylinder 12, and a second fixed expansion cavity 38.2 is formed between the second baffle 38 and the left end wall 38.3 of the silencer outer cylinder;

a connecting column 2 is coaxially arranged between the first baffle disc 9 and the second baffle disc 38; the two ends of the connecting column 2 are respectively and fixedly connected with a first baffle disc 9 and a second baffle disc 38 in an integrated manner;

also comprises a movable plug 13; the movable plug 13 is of a hollow cylinder structure; the movable plug 13 is coaxial with the inner cavity of the left section 101 of the silencer; the cylindrical outer wall of the movable plug 13 is in clearance fit with the inner wall of the outer cylinder 12 of the silencer; the middle part of the right end wall 11 of the movable plug 13 is coaxially and hollowly provided with a first through hole 3 with the diameter larger than that of the connecting column 2, and the middle part of the left end wall 14 of the movable plug 13 is coaxially and hollowly provided with a second through hole 6 with the diameter larger than that of the connecting column 2; the connecting column 2 is respectively inserted into the first through hole 3 and the second through hole 6; the middle part of the connecting column 2 is integrally and coaxially provided with a spring catch disc 40; a first return spring 41 and a second return spring 39 are further sleeved on the connecting column 2, the first return spring 41 is located between the right end wall 11 and the spring stop disc 40, and the second return spring 39 is located between the left end wall 14 and the spring stop disc 40; a first movable expansion cavity 10 is formed between the first baffle disc 9 and the right end wall 11, and a second movable expansion cavity 42 is formed between the left end wall 14 and the second baffle disc 38;

the gas-guide tube device further comprises a plurality of gas-guide tubes 4, each gas-guide tube 4 penetrates through the plug cavity 5 of the movable plug 13 along the axial direction, two ends of each gas-guide tube 4 respectively extend into the first movable expansion cavity 10 and the second movable expansion cavity 42, and each gas-guide tube 4 is uniformly distributed along the axial line of the movable plug 13 in a circumferential array.

As shown in fig. 1, 5 and 6, the system further comprises a tail gas combustion-supporting air supplement valve 46, wherein the tail gas combustion-supporting air supplement valve 46 comprises an air supplement pipe 17, and the air supplement pipe 17 is of a hard pipe body structure; the air supplementing pipe 17 is vertically and integrally connected with the engine tail gas exhaust pipe 7, and an air outlet end of the air supplementing pipe 17 bypasses an airflow channel 7.1 of the engine tail gas exhaust pipe 7;

the pipe of the air supply pipe 17 further comprises a valve ring platform 27, the outer ring of the valve ring platform 27 is connected with the inner wall of the air supply pipe 17 in a sealing mode, the inner ring 28 of the valve ring platform 27 is of a taper hole structure, and one end, close to the exhaust pipe 43 of the silencer, of a taper hole of the inner ring 28 is a taper hole thick end;

a valve core 24 is coaxially arranged in the air supplementing pipe 17; the valve core 24 is a conical thin-wall revolving body structure, and the conical outer wall of the valve core 24 is in sealing contact with the conical hole of the inner ring 28 of the valve annular table 27;

a spring seat 30 is also coaxially supported and arranged on one side of the thick end of the valve core 24 in the air supply pipe 17, and the spring seat 30 is of a rotary structure with the diameter smaller than the inner diameter of the air supply pipe 17; the spring seat 30 is at least in supporting connection with the inner diameter of the air supplementing pipe 17 through a supporting part 31; a cylindrical spring boss 33 is arranged on one side of the spring seat 30 close to the valve core 24;

the tube of the air supply tube 17 also coaxially comprises a valve core guide post 19 and a valve core stroke control post 25; the valve core guide post 19 and the valve core stroke control post 25 are respectively and fixedly connected with two ends of a valve tip 24.1 of the valve core 24, wherein the valve core stroke control post 25 is positioned at one side close to the spring seat 30;

a top pressure spring 26 in a compressed state; one end of the top pressure spring 26 is sleeved on the valve core stroke control column 25, and the other end is sleeved on the spring boss 33; a stroke limit space 33.1 is arranged between the tail end 29 of the valve core stroke control column and the tail end 34 of the spring boss;

a limiting column seat 18 is also arranged in the air supply pipe 17 and coaxially supported, and the limiting column seat 18 is of a revolving body structure with the diameter smaller than the inner diameter of the air supply pipe 17; the limiting column seat 18 is connected with the inner wall of the air supplementing pipe 17 through a supporting rod 23; the valve core guide post 19 can movably penetrate through a guide post hole on the limiting post seat 18;

in the air supply pipe 17, a negative pressure forming cavity 17.1 is arranged on one side of the valve ring platform 27 close to the engine tail gas exhaust pipe 7, and an air channel cavity 20 is arranged on one side of the valve ring platform 27 far away from the engine tail gas exhaust pipe 7; a passive fan blade 22 is coaxially arranged in the air duct cavity 20; the other end of the fan rotating shaft 15 of the driven fan blade 22 is synchronously connected with a core rotor of the generator, and can also play a role in generating electricity, and fully utilize the energy of airflow generated in the air duct cavity 20.

2. The method, the process, the principle and the technical progress of the scheme are organized as follows:

tail gas silencing process: when the four-stroke engine operates, in the exhaust stroke of four strokes in one state period of the engine, high-temperature and high-pressure exhaust gas in a cylinder rapidly enters the engine tail gas exhaust pipe 7 along with pulse waves and is rapidly led into the detonation cavity 67, in the process, air supplemented by the tail gas combustion-supporting air supplement valve 46 also enters the engine tail gas exhaust pipe 7, residual gases such as CO and HC which are not completely combusted in the cylinder and the supplemented air are detonated in the detonation cavity 67, the pulse waves and the tail gas generated by the deflagration expand outwards under the drainage action of the pointed cone column 57, and then part of expanded smoke and pulses are dispersed to the overflow channel 74 in a divergent manner through each group of deflagration buffering air escape holes 72, and the process has resistive silencing and resistive silencing effects;

the residual tail gas and pulse wave in the deflagration cavity 67 are guided into the first fixed expansion cavity 8 through each exhaust mesh 1, meanwhile, the tail gas and pulse wave in the deflagration overflow channel 74 are guided into the first fixed expansion cavity 8 through each guide-out hole 8.3, and because the pulse waves from different paths are merged in the first fixed expansion cavity 8, part of the pulse waves with opposite phases cause cancellation interference; the CO, HC and other gases which are not completely reacted in the first fixed expansion cavity 8 fully react with the supplemented oxygen and expand, the further rapidly expanded gases and pulse waves in the first fixed expansion cavity 8 enter the first movable expansion cavity 10 through a first annular gap 9.1 between the first baffle disc 9 and the outer cylinder 12 of the muffler, the pressure of the first movable expansion cavity 10 is rapidly increased in the process that the pulse waves and the expanded tail gas enter the first movable expansion cavity 10, the movable plug 13 is further pushed to rapidly displace leftwards, the volume of the first movable expansion cavity 10 is enlarged along with the leftward displacement of the movable plug 13, and the reactive silencing strength of the first movable expansion cavity 10 is further improved; furthermore, tail gas and pulse waves at the central part of the first movable expansion cavity 10 enter the plug cavity 5 through a gap ring between the connecting column 2 and the first through hole 3 to generate resistance noise elimination, tail gas and pulse waves at the edge part of the first movable expansion cavity 10 enter the plurality of air guide tubes 4 to generate resistance noise elimination in the air guide tubes 4, and simultaneously vibration generated by the outer wall of each air guide tube 4 generates resonance with vibration of the plug cavity 5 to generate partial interference cancellation effect; further, the tail gas in each gas guide tube 4 and the plug cavity 5 is guided into the second movable expansion cavity 42 together with the pulse wave, at this time, the pulse waves from different paths in the second movable expansion cavity 42 are merged, and the pulse waves with partially opposite phases cause cancellation interference, so that a pulse interference noise elimination effect is generated in the second movable expansion cavity 42, meanwhile, the pressure in the second movable expansion cavity 42 starts to increase rapidly, the tail gas in the next engine exhaust stroke does not reach the first movable expansion cavity 10, the pressure in the first movable expansion cavity 10 decreases rapidly, the second movable expansion cavity 42 pushes the movable plug 13 to displace rightwards rapidly, and as the movable plug 13 moves rightwards, the volume of the second movable expansion cavity 42 is enlarged, so that the reactive noise elimination strength of the second movable expansion cavity 42 is improved; the reciprocating cycle is carried out in such a way that the reactive silencing volumes of the second movable expansion cavity 42 and the first movable expansion cavity 10 are larger than the actual volumes; further, the exhaust gas in the second movable expansion chamber 42 enters the second fixed expansion chamber 38.2 through the second annular gap 38.1 along with the pulse wave, and finally the exhaust gas is exhausted through the muffler exhaust pipe 43;

and (3) combustion-supporting oxygen gas supplementing process: when the four-stroke engine is running, the exhaust pressure in the exhaust pipe 7 of the engine varies periodically with four working cycles of the engine, and in one cycle period of the engine: when the exhaust valve of the four-stroke engine is opened, high-temperature and high-pressure waste gas in the cylinder rapidly enters the exhaust pipe 7 of the engine tail gas, the pressure in the exhaust pipe 7 of the engine tail gas begins to rise, a high-pressure pulse is generated in the exhaust pipe 7 of the engine tail gas, namely, a positive pressure wave is generated, then a strong positive pressure is formed at the negative pressure forming cavity 17.1 in the air supply pipe 17, so that the negative pressure forming cavity 17.1 generates outward extrusion force on the valve core 24, and because one end of the conical hole of the inner ring 28 of the valve ring platform 27, which is close to the exhaust pipe 43 of the muffler, is a thick end of the conical hole, the conical outer wall of the valve core 24 tightly extrudes the inner ring 28 of the valve ring platform 27, so that the air channel cavity; with the continuous forward propagation of the positive pressure pulse wave along the exhaust pipe 7 of the engine exhaust, after the positive pressure wave enters the muffler body 44, the section of the pipeline thereof is suddenly increased, the gas density is reduced, so that a negative pressure wave is generated to return, further a strong negative pressure is formed at the position of the negative pressure forming cavity 17.1, at this time, the negative pressure forming cavity 17.1 generates an inward suction force on the valve core 24, the conical outer wall of the valve core 24 starts to be separated from the conical hole of the inner ring 28 of the valve ring platform 27 under the action of the negative pressure in the negative pressure forming cavity 17.1, a gas passing gap is rapidly formed between the conical outer wall of the valve core 24 and the inner ring 28 of the valve ring platform 27, the opening and closing of the passing gap is controlled by the stroke limiting gap 33.1 arranged between the tail end 29 of the valve core stroke control column and the tail end 34 of the spring boss, and the stroke limiting gap 33.1 avoids the formation of the, the result that the return stroke is too large and the opening and closing sensitivity of the valve core 24 is reduced is caused; at this time, because the air duct cavity 20 is at the atmospheric pressure of the environment, the air in the air duct cavity 20 is rapidly sucked into the negative pressure forming cavity 17.1 under the action of negative pressure, and further enters the exhaust pipe 7 of the engine and the muffler body 44, the oxygen contained in the air supplemented by the exhaust combustion-supporting air make-up valve 46 is fully combusted with residual harmful gases such as CO and HC which are not completely combusted in the engine, so that the products such as carbon dioxide which are completely combusted are finally discharged, and the emission of harmful gases is reduced; when the next exhaust period comes, the negative pressure in the negative pressure forming cavity 17.1 is rapidly lost, the conical outer wall of the valve core 24 tightly presses the inner ring 28 of the valve annular table 27 under the action of the jacking spring 26, and the air channel cavity 20 and the negative pressure forming cavity 17.1 are restored to be closed; due to the period and the short duration of the engine, the comprehensive effect is that air in the air duct cavity 20 is continuously sucked into the negative pressure forming cavity 17.1, then the formed air flow drives the fan blade 22 to continuously rotate, the fan blade 22 drives the core rotor of the generator at the other end of the fan rotating shaft 15 to rotate, and power is generated to supply power to other electric devices.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. The utility model provides a tonifying qi formula engine exhaust gas treatment system which characterized in that: comprises an engine exhaust pipe (7), a muffler body (44) and a muffler exhaust pipe (43); the air inlet end of the engine tail gas exhaust pipe (7) is communicated and connected with the exhaust valve end of the four-stroke engine; the air outlet end of the engine tail gas exhaust pipe (7) is in conduction connection with the tail gas inlet end of the silencer body (44); the tail gas exhaust end of the silencer body (44) is connected with the silencer exhaust pipe (43) in a conduction mode;

the silencer body (44) comprises a silencer outer cylinder (12), and the silencer outer cylinder (12) is of a closed cylinder structure; a muffler separating disc (8.1) is coaxially arranged in the middle of the inner cavity of the muffler outer cylinder (12); the left side of the separating disc (8.1) is a silencer left section (101), and the right side of the separating disc (8.1) is a silencer right section (102);

an explosion buffer cylinder (71) is coaxially arranged in an inner cavity of the right section (102) of the silencer, and an explosion overflow channel (74) is formed between the explosion buffer cylinder (71) and the inner wall of the outer cylinder (12) of the silencer; the right end of the deflagration buffer cylinder (71) is in conduction connection with the tail gas exhaust end of the engine tail gas exhaust pipe (7), the left end of the deflagration buffer cylinder (71) coaxially extends into the right end inner cavity of the left section (101) of the muffler, the end part of the left end of the deflagration buffer cylinder (71) is integrally provided with a first baffle disc (9) coaxially, a plurality of exhaust meshes (1) are distributed on a section of pipe wall of the deflagration buffer cylinder (71) extending into the left section (101) of the muffler, each exhaust mesh (1) is uniformly distributed in a circumferential array, and the deflagration buffer cylinder (71) and the right end inner cavity of the left section (101) of the muffler are mutually conducted through each exhaust mesh (1);

a sharp-pointed cone column (57) is coaxially suspended in a deflagration cavity (67) of the deflagration buffer cylinder (71), and the thick end of the sharp-pointed cone column (57) is fixedly connected with the first baffle disc (9) through a coaxial supporting rod (07); a plurality of deflagration buffering air release holes (72) are distributed on the wall of the deflagration buffering cylinder (71) close to one side of the tip of the tapered column (57) in a circumferential array manner; each deflagration buffering air leakage hole (72) is used for communicating the deflagration cavity (67) with a deflagration overflow channel (74);

a plurality of guide holes (8.3) are hollowed in a circumferential array manner on the muffler separating disc (8.1) at the left end of the deflagration overflow channel (74), and the guide holes (8.3) are used for mutually conducting the deflagration overflow channel (74) and the right end inner cavity of the muffler left section (101);

the first baffle disc (9) is of a disc-shaped structure, and a first annular gap (9.1) is formed between the first baffle disc (9) and the silencer outer cylinder (12); a first fixed expansion cavity (8) is arranged between the first baffle disc (9) and the muffler separating disc (8.1); the left end of the inner cavity of the left section (101) of the silencer is coaxially connected with the silencer exhaust pipe (43) in a conduction mode; a second baffle disc (38) is coaxially arranged at one end, close to a tail gas outlet (37) of the silencer, in the inner cavity of the left section (101) of the silencer, a second annular gap (38.1) is formed between the second baffle disc (38) and the inner wall of the outer silencer cylinder (12), and a second fixed expansion cavity (38.2) is formed between the second baffle disc (38) and the left end wall (38.3) of the outer silencer cylinder;

a connecting column (2) is coaxially arranged between the first baffle disc (9) and the second baffle disc (38); the two ends of the connecting column (2) are respectively and integrally fixedly connected with a first baffle disc (9) and a second baffle disc (38);

also comprises a movable plug (13); the movable plug (13) is of a hollow cylinder structure; the movable plug (13) is coaxial with the inner cavity of the left section (101) of the silencer; the cylindrical outer wall of the movable plug (13) is in clearance fit with the inner wall of the outer cylinder (12) of the silencer; the middle part of the right end wall (11) of the movable plug (13) is coaxially and hollowly provided with a first through hole (3) with the diameter larger than that of the connecting column (2), and the middle part of the left end wall (14) of the movable plug (13) is coaxially and hollowly provided with a second through hole (6) with the diameter larger than that of the connecting column (2); the connecting column (2) is respectively inserted into the first through hole (3) and the second through hole (6); the middle part of the connecting column (2) is integrally and coaxially provided with a spring catch disc (40); a first return spring (41) and a second return spring (39) are further sleeved on the connecting column (2), the first return spring (41) is located between the right end wall (11) and the spring retaining disc (40), and the second return spring (39) is located between the left end wall (14) and the spring retaining disc (40); a first movable expansion cavity (10) is formed between the first baffle disc (9) and the right end wall (11), and a second movable expansion cavity (42) is formed between the left end wall (14) and the second baffle disc (38);

the gas-guide tube type gas-guide tube expansion device is characterized by further comprising a plurality of gas-guide tubes (4), wherein each gas-guide tube (4) penetrates through the plug cavity (5) of the movable plug (13) along the axis direction, two ends of each gas-guide tube (4) respectively extend into the first movable expansion cavity (10) and the second movable expansion cavity (42), and each gas-guide tube (4) is uniformly distributed along the axis of the movable plug (13) in a circumferential array mode.

2. The system of claim 1, wherein: the device is characterized by further comprising a tail gas combustion-supporting air supplement valve (46), wherein the tail gas combustion-supporting air supplement valve (46) comprises an air supplement pipe (17), and the air supplement pipe (17) is of a hard pipe body structure; the air supplementing pipe (17) is vertically and integrally connected with the engine tail gas exhaust pipe (7), and the air outlet end of the air supplementing pipe (17) bypasses an air flow channel (7.1) of the engine tail gas exhaust pipe (7);

the pipe of the air supply pipe (17) is internally provided with a valve ring platform (27), the outer ring of the valve ring platform (27) is hermetically connected with the inner wall of the air supply pipe (17), the inner ring (28) of the valve ring platform (27) is of a taper hole structure, and one end, close to the exhaust pipe (43) of the silencer, of the taper hole of the inner ring (28) is a taper hole thick end;

a valve core (24) is coaxially arranged in the air supply pipe (17); the valve core (24) is of a conical thin-wall rotary structure, and the conical outer wall of the valve core (24) is in sealing contact with the conical hole of the inner ring (28) of the valve annular table (27);

a spring seat (30) is also coaxially supported and arranged on one side of the thick end of the valve core (24) in the air supply pipe (17), and the spring seat (30) is of a rotary body structure with the diameter smaller than the inner diameter of the air supply pipe (17); the spring seat (30) is in supporting connection with the inner diameter of the air supplementing pipe (17) through at least one supporting part (31); a cylindrical spring boss (33) is arranged on one side, close to the valve core (24), of the spring seat (30);

the inside of the air supply pipe (17) is also coaxial with the axle center and comprises a valve core guide post (19) and a valve core stroke control post (25); the valve core guide post (19) and the valve core stroke control post (25) are respectively and fixedly connected to two ends of a valve tip (24.1) of the valve core (24), wherein the valve core stroke control post (25) is positioned at one side close to the spring seat (30); the device also comprises a top pressure spring (26) in a compressed state; one end of the top pressure spring (26) is sleeved on the valve core stroke control column (25), and the other end of the top pressure spring is sleeved on the spring boss (33); a stroke limit space (33.1) is arranged between the tail end (29) of the valve core stroke control column and the tail end (34) of the spring boss;

a limiting column seat (18) is also arranged in the air supply pipe (17) in a coaxial support manner, and the limiting column seat (18) is of a rotary structure with the diameter smaller than the inner diameter of the air supply pipe (17); the limiting column seat (18) is supported and connected with the inner wall of the air supplementing pipe (17) through a supporting rod (23); the valve core guide post (19) can movably penetrate through a guide post hole in the limiting post seat (18);

in the air supply pipe (17), a negative pressure forming cavity (17.1) is arranged on one side, close to the engine tail gas exhaust pipe (7), of the valve ring platform (27), and an air channel cavity (20) is arranged on one side, far away from the engine tail gas exhaust pipe (7), of the valve ring platform (27); a passive fan blade (22) is coaxially arranged in the air duct cavity (20); the other end of the fan rotating shaft (15) of the driven fan blade (22) is synchronously connected with a core rotor of the generator.

3. A method of an exhaust gas treatment system of an air-supplementing type engine is characterized in that:

tail gas silencing process: when the four-stroke engine is operated, the exhaust stroke in four strokes in one state period of the engine rapidly enters an engine tail gas exhaust pipe (7) through high-temperature and high-pressure exhaust gas in a cylinder along with pulse waves and is rapidly introduced into a detonation cavity (67), in the process, because the air supplemented by the tail gas combustion-supporting air supplement valve (46) also enters the tail gas exhaust pipe (7) of the engine, the residual gases such as CO, HC and the like which are not completely combusted in the cylinder in the tail gas and the supplemented air are subjected to deflagration in the deflagration cavity (67), the pulse wave and tail gas generated by deflagration expand outwards under the drainage action of the pointed cone column (57), then, part of expanded smoke and pulse are divergently dispersed to a deflagration overflow channel (74) through each deflagration buffering air leakage hole (72), and the process has resistive silencing effect and resistive silencing effect at the same time;

residual tail gas and pulse waves in the detonation cavity (67) are guided into the first fixed expansion cavity (8) through the exhaust mesh openings (1), meanwhile, tail gas and pulse waves in the detonation overflow channel (74) are guided into the first fixed expansion cavity (8) through the guide outlet openings (8.3), and due to the fact that pulse waves from different paths are merged in the first fixed expansion cavity (8), part of pulse waves with opposite phases cause cancellation interference; CO, HC and other gases which are not completely reacted in the first fixed expansion cavity (8) fully react with the supplemented oxygen and expand, the further rapidly expanded gases and pulse waves in the first fixed expansion cavity (8) enter the first movable expansion cavity (10) through a first annular gap (9.1) between the first baffle disc (9) and the silencer outer cylinder (12), the pressure of the first movable expansion cavity (10) is rapidly increased in the process that the pulse waves and the expanded tail gas enter the first movable expansion cavity (10), the movable plug (13) is further pushed to rapidly displace leftwards, the volume of the first movable expansion cavity (10) is expanded along with the leftward displacement of the movable plug (13), and the reactive silencing strength of the first movable expansion cavity (10) is further improved; furthermore, tail gas and pulse waves at the central part of the first movable expansion cavity (10) enter the plug cavity (5) through a gap ring between the connecting column (2) and the first through hole (3) to generate resistance noise elimination, the tail gas and the pulse waves at the edge part of the first movable expansion cavity (10) enter a plurality of air guide pipes (4) to generate resistance noise elimination in the air guide pipes (4), and simultaneously vibration generated by the outer wall of each air guide pipe (4) and vibration of the plug cavity (5) generate resonance to generate partial interference cancellation effect; furthermore, the tail gas in each gas guide tube (4) and the plug cavity (5) is guided into the second movable expansion cavity (42) together along with the pulse wave, at the moment, because the pulse waves from different paths are merged in the second movable expansion cavity (42), the pulse waves with partially opposite phases cause cancellation interference, so that pulse interference noise elimination effect is generated in the second movable expansion cavity (42), and meanwhile, the pressure in the second movable expansion cavity (42) rapidly begins to increase, while the tail gas of the next engine exhaust stroke does not reach the first movable expansion cavity (10), the pressure in the first movable expansion cavity (10) is rapidly reduced, the second movable expansion cavity (42) pushes the movable plug (13) to rapidly displace rightwards, and the volume of the second movable expansion cavity (42) is enlarged along with the rightward displacement of the movable plug (13), so that the resistance silencing strength of the second movable expansion cavity (42) is improved; the reciprocating circulation is carried out in such a way that the reactive silencing volume of the second movable expansion cavity (42) and the first movable expansion cavity (10) is larger than the actual volume of the second movable expansion cavity and the first movable expansion cavity; further, the tail gas in the second movable expansion cavity (42) enters the second fixed expansion cavity (38.2) through the second annular gap (38.1) along with the pulse wave, and finally the tail gas is discharged through the exhaust pipe (43) of the silencer;

and (3) combustion-supporting oxygen gas supplementing process: when the four-stroke engine is operated, the exhaust pressure in an exhaust pipe (7) of the engine is periodically changed along with four working cycles of the engine, and in one cycle period of the engine: when an exhaust valve of the four-stroke engine is opened, high-temperature and high-pressure exhaust gas in a cylinder rapidly enters an engine exhaust gas exhaust pipe (7), the pressure in the engine exhaust gas exhaust pipe (7) begins to rise, a high-pressure pulse is generated in the engine exhaust gas exhaust pipe (7), namely, a positive pressure wave is generated, and then a strong positive pressure is formed at a negative pressure forming cavity (17.1) in an air supply pipe (17), so that the negative pressure forming cavity (17.1) generates an outward extrusion force on a valve core (24), and because one end of a conical hole of an inner ring (28) of a valve ring platform (27) close to an exhaust pipe (43) of a silencer is a thick end of the conical hole, the conical outer wall of the valve core (24) tightly presses the inner ring (28) of the valve ring platform (27), and the air channel cavity (20) and the negative pressure forming cavity (17.1) are closed; with the continuous forward propagation of positive pressure pulse wave along the exhaust pipe (7) of the engine tail gas, when the positive pressure wave enters the muffler body (44), the section of the pipeline of the muffler body is suddenly increased, the gas density is reduced, so that a negative pressure wave is generated to return, further a strong negative pressure is formed at the position of a negative pressure forming cavity (17.1), at the moment, the negative pressure forming cavity (17.1) generates inward suction to the valve core (24), the conical outer wall of the valve core (24) is separated from the conical hole of the inner ring (28) of the valve ring platform (27) under the action of the negative pressure in the negative pressure forming cavity (17.1), a gas passing gap is rapidly formed between the conical outer wall of the valve core (24) and the inner ring (28) of the valve ring platform (27), the opening and closing of the passing gap is controlled by a stroke limiting gap (33.1) arranged between the tail end (29) of the valve core stroke control column and the tail end (34) of the spring boss, and the stroke limiting gap (33.1) avoids the formation of gas passing gap between the conical outer wall The clearance is too large, so that the return stroke is too large, and the opening and closing sensitivity of the valve core (24) is reduced; at the moment, because the air duct cavity (20) is at the atmospheric pressure of the environment, the air in the air duct cavity (20) is rapidly sucked into the negative pressure forming cavity (17.1) under the action of negative pressure and further enters the exhaust pipe (7) of the engine and the silencer body (44), and oxygen contained in the air supplemented by the tail gas combustion-supporting air supplementing valve (46) is fully combusted with residual harmful gases such as CO and HC which are not completely combusted in the engine, so that products such as completely combusted carbon dioxide are finally discharged, and the emission of harmful gases is reduced; when the next exhaust period comes, the negative pressure in the negative pressure forming cavity (17.1) can be rapidly lost, the conical outer wall of the valve core (24) tightly presses the inner ring (28) of the valve annular table (27) under the action of the top pressure spring (26), and the air channel cavity (20) and the negative pressure forming cavity (17.1) are restored to be closed; due to the period and the short duration of the engine, the comprehensive effect is that air in the air duct cavity (20) is continuously sucked into the negative pressure forming cavity (17.1), then the formed air flow drives the fan blade (22) to continuously rotate, the fan blade (22) drives the movement rotor of the generator at the other end of the fan rotating shaft (15) to rotate, and power is generated to supply power to other electric devices.